Stockholders' Equity (Details 3) - $ / shares	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Investors [Member]
Warrants, Vesting terms	Immediately
Investors [Member] \| Measurement Input, Expected Term [Member]
Warrants, Expected term, in years	6 years
Investors [Member] \| Measurement Input, Expected Dividend Rate [Member]
Fair Value Assumptions Rate	0.00%
Investors [Member] \| Warrant [Member]
Warrants (in shares)	474,667	52,910
Warrants, Weighted average exercise price	$ 0.47	$ 10.00
Warrants, Weighted average grant date fair value	$ 0.19	$ 3.80
Warrants, Vesting terms	Six months	Immediately
Investors [Member] \| Warrant [Member] \| Measurement Input, Price Volatility [Member]
Fair Value Assumptions Rate	118.00%	109.00%
Investors [Member] \| Warrant [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Fair Value Assumptions Rate	2.90%	1.89%
Investors [Member] \| Warrant [Member] \| Measurement Input, Expected Term [Member]
Warrants, Expected term, in years	5 years	5 years
Investors [Member] \| Warrant [Member] \| Measurement Input, Expected Dividend Rate [Member]
Fair Value Assumptions Rate	0.00%	0.00%
Noteholders [Member] \| Warrant [Member]
Warrants (in shares)		83,333
Warrants, Weighted average exercise price		$ 4.00
Warrants, Weighted average grant date fair value		$ 2.16
Warrants, Vesting terms		Immediately
Noteholders [Member] \| Warrant [Member] \| Measurement Input, Price Volatility [Member]
Fair Value Assumptions Rate		105.00%
Noteholders [Member] \| Warrant [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Fair Value Assumptions Rate		1.91%
Noteholders [Member] \| Warrant [Member] \| Measurement Input, Expected Term [Member]
Warrants, Expected term, in years		5 years
Noteholders [Member] \| Warrant [Member] \| Measurement Input, Expected Dividend Rate [Member]
Fair Value Assumptions Rate		0.00%

The number of class of warrant or right granted for the during period.

No definition available.

Name:	imnp_ClassOfWarrantOrRightSharesGranted
Namespace Prefix:	imnp_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Class of warrant or right weighted average exercise price granted.

+ References

No definition available.

+ Details

Name:	imnp_ClassOfWarrantOrRightWeightedAverageExercisePriceGranted
Namespace Prefix:	imnp_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Class of warrant or right weighted grant date fair value granted.

+ References

No definition available.

+ Details

Name:	imnp_ClassOfWarrantOrRightWeightedAverageGrantDateFairValueGranted
Namespace Prefix:	imnp_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

It represents the fair value assumptions rate.

+ References

No definition available.

+ Details

Name:	imnp_FairValueAssumptionsRate
Namespace Prefix:	imnp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	imnp_FairValueAssumptionsTerm
Namespace Prefix:	imnp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Namespace Prefix:
Data Type:	na
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- Details

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Namespace Prefix:
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